I have a 92 ex. It used to blow cold A/C. One day it stopped. Yesterday I noticed a couple of my vacuum lines were broken at the A/C box. The last time I charged the A/C I put a compressor of a friend’s truck and it never blew cold air. I put my old A/C compressor back on my buddy’s truck and he charged and it blows cold. I also blew my condenser out and put in a new orifice tube. Could the vacuum lines being broke do this?
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Help A/C problem
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something9000
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well i would start by replacing any broken lines and have you tested power at the a.c clutch connector?
Roadrunner777
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In a 92, the lines supply vacuum to the A/C control panel. If it is set to MAX A/C, vacuum is passed on to a vacuum dashpot which opens the system to outside air instead of recirculation. A problem with these lines may cause less than perfect A/C, but it should still be cool air.
FYI, in later 1st generation, there is also a manifold in the heater hoses that bypasses the heater core when it is on MAX A/C.
I happened to be looking at these lines today and found a nick in one of them. I spliced it up, and I got performance I never knew was there in A/C. I was lucky to find that little hole!
By the way, Orielly's should have that plastic line and fittings in stock. I made my splice by cutting the end off a long rubber vacuum fitting cap and fitting the ends in from either side, then overwrapped with electrical tape. Heat shrink tubing would probably work just as well to make a splice.
FYI, in later 1st generation, there is also a manifold in the heater hoses that bypasses the heater core when it is on MAX A/C.
I happened to be looking at these lines today and found a nick in one of them. I spliced it up, and I got performance I never knew was there in A/C. I was lucky to find that little hole!
By the way, Orielly's should have that plastic line and fittings in stock. I made my splice by cutting the end off a long rubber vacuum fitting cap and fitting the ends in from either side, then overwrapped with electrical tape. Heat shrink tubing would probably work just as well to make a splice.
needhelp1
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gloomis
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needhelp1,
It's in the line between the evaporator core and the condensor.
Which is down under the accumator/dryer, sort of down and to the engine side of the air filter box.
You should find a connection there in the hard line.
Hope that helps!
It's in the line between the evaporator core and the condensor.
Which is down under the accumator/dryer, sort of down and to the engine side of the air filter box.
You should find a connection there in the hard line.
Hope that helps!
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